The electrostatic force between two-point charges is F. The charge on each point charge is doubled and the distance between charges is also doubled. What is the new
force between them?

What is the final velocity of the initial velocity of 25 and -50?

The material that keeps its new shape after it is stretched is called?

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?